Building services in Helensburgh
House extensions
- Single-storey extensions
- Double-storey extensions
- Side extensions
- Side return extensions
- Wraparound extensions
- Kitchen extensions
- Orangeries
- Glazed and contemporary extensions
- Porches
Loft conversions
- Dormer loft conversions
- Hip-to-gable loft conversions
- Mansard loft conversions
- Rooflight loft conversions
- Bungalow loft conversions
Garage, basement and barn conversions
New build homes
Renovations and structural work
Design and approvals
Guide prices in Helensburgh
| Project | Guide range (inc VAT) |
|---|---|
| Single-storey extensions | £1,900–£2,800 per m² of floor area |
| Kitchen extensions | £2,200–£3,300 per m² including a mid-range kitchen |
| Dormer loft conversions | £46,500–£66,000 for a typical rear dormer with en-suite |
| Hip-to-gable loft conversions | £53,500–£75,500 for a hip-to-gable with rear dormer |
| House renovations | £850–£1,750 per m² for a medium to full renovation |
| Structural alterations and knock-throughs | £4,250–£9,250 for a typical knock-through with steel beam |
Building costs in Scotland are close to the UK average, so the figures for Helensburgh are close to our national guide.
Planning permission in Helensburgh
In Scotland a single-storey extension is often permitted development (Class 1A): where any part is within 1 metre of a boundary, it can project up to 3 metres from the rear wall of a terraced house or 4 metres on other houses, with eaves no higher than 3 metres, an overall height of 4 metres and no more than half the front or rear garden covered. The rights do not apply in conservation areas or to flats, and a building warrant will usually still be needed before work starts.
In Scotland a building warrant is needed before work starts on most extensions, loft conversions and conversions. It is issued by the council’s building standards service. When the work is finished, a completion certificate is submitted and accepted by the council after inspection.
About building in Helensburgh
Scotland’s housing ranges from sandstone tenements and villas to post-war and modern estates, and the building warrant system shapes how projects are planned.
Helensburgh sits in Argyll and Bute, about 40 miles south-east of Oban. We cover the whole of Helensburgh, including postcodes G84. Helensburgh has a population of around 13,000.
How it works
- 01
Visit and measured survey
A free visit to understand the project, check access and take measurements.
- 02
Design and pricing
Design options, then a fixed quote based on the chosen drawings and specification.
- 03
Approvals
Planning or permitted development confirmation, building regulations and any party wall matters.
- 04
Build and handover
Work follows the agreed programme, with inspections along the way and a completion certificate at the end.
Questions from homeowners in Helensburgh
Is the home visit free?
Yes. The first visit to discuss your project and measure up for a quote is free, with no obligation.
Do I need planning permission for an extension in Helensburgh?
In Scotland a single-storey extension is often permitted development (Class 1A): where any part is within 1 metre of a boundary, it can project up to 3 metres from the rear wall of a terraced house or 4 metres on other houses, with eaves no higher than 3 metres, an overall height of 4 metres and no more than half the front or rear garden covered. The rights do not apply in conservation areas or to flats, and a building warrant will usually still be needed before work starts.
How much does an extension cost in Helensburgh?
A single-storey extension in Helensburgh typically costs £1,900–£2,800 per m² of floor area, and a double-storey extension £1,600–£2,400 per m² of floor area (both floors), including VAT.
How much does a loft conversion cost in Helensburgh?
A rear dormer loft conversion in Helensburgh typically costs £46,500–£66,000 for a typical rear dormer with en-suite, including VAT.
Do you work in Helensburgh?
Yes. We take on extensions, loft conversions, conversions, renovations and new builds across Helensburgh, including postcodes G84.